Standard operation procedures for Japanease Black cattle related to management procedures

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  • IRIKURA Noriko
    Department of Animal and Grassland Sciences, Faculty of Agriculture, University of Miyazaki
  • UEMATSU Mizuho
    Miyazaki Agricultural Mutual Aid Association
  • KITAHARA Go
    Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki Center for Animal Disease Control, University of Miyazaki
  • OSAWA Takeshi
    Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki Center for Animal Disease Control, University of Miyazaki
  • SASAKI Yosuke
    Center for Animal Disease Control, University of Miyazaki Organization for Promotion of Tenure Track, University of Miyazaki

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  • 宮崎県における和牛繁殖農場の飼養管理の疫学調査および飼養規模と地域間における比較
  • ミヤザキケン ニ オケル ワギュウ ハンショク ノウジョウ ノ シヨウ カンリ ノ エキガク チョウサ オヨビ シヨウ キボ ト チイキ カン ニ オケル ヒカク

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Abstract

<p>The objective of the present study was to assess management procedures for Japanease Black cattle and to compare the procedures between herd size in cow-calf operation located in Miyazaki prefecture. A questionnaire survey was conducted to ask the production system and management procedures. The 331 farms were categorized into three groups based on the average cow inventory : small (1 to 10 cows ; n＝148), middle (11 to 20 cows ; n＝90) and large (more than 21 cows ; n＝93). The mean±SEM of number of cows was 21.3±1.8 cows. The results of questionnaire survey showed that large farms had a higher proportion of farms remaining cows in the calving room at peripartum period than small farms (P<0.05), whereas small farms had a higher proportion of farms putting cows in the stall barns in vicinity of calving than large farms (P<0.05). Proportion of farms that predicted the timing of parturition of cows by their behavior was 65.9%, whereas proportion of farms that predicted by using remote censor was 8.2%. Large farms had higher proportions of farms that predicted the timing of parturition of cows by using observation and remote censor than small farms (P<0.05). Proportion of farms that confirmed estrus of cows by their behavior was 79.8%, whereas proportion of farms that confirmed estrus of cows by using remote censor was 3.9%. Large farms had higher proportions of farms that confirmed estrus by their behavior and remote censor than small farms (P<0.05). Proportion of farms using echography as pregnancy check was 62%, but no difference between herd size groups was found. Proportion of farms that reduced heat stress by using cooling fans was 79.8%, and large farms had higher proportions than small farms (P<0.05). Proportion of farms that reduced cold stress by using heater was 53.2%. Small farms had the lowest proportions of farms that reduced cold stress by using heater (P<0.05). In summary, the present study showed that management procedures were different among herd size.</p>

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